/** Returns this address's certificate pinner, or null if this is not an HTTPS address. */
  @get:JvmName("certificatePinner") val certificatePinner: CertificatePinner?,
  /** Returns the client's proxy authenticator. */
  @get:JvmName("proxyAuthenticator") val proxyAuthenticator: Authenticator,
  /**
   * Returns this address's explicitly-specified HTTP proxy, or null to delegate to the

/// tip | Tipp

Bedenken Sie, dass JSON nur `str` als Schlüssel unterstützt.

Aber Pydantic hat automatische Datenkonvertierung.

Das bedeutet, dass Ihre API-Clients nur Strings senden können, aber solange diese Strings nur Zahlen enthalten, wird Pydantic sie konvertieren und validieren.

Und das `dict`, welches Sie als `weights` erhalten, wird `int`-Schlüssel und `float`-Werte haben.

## 处理断开连接和多个客户端 { #handling-disconnections-and-multiple-clients }

当 WebSocket 连接关闭时，`await websocket.receive_text()` 将引发 `WebSocketDisconnect` 异常，您可以捕获并处理该异常，就像本示例中的示例一样。

{* ../../docs_src/websockets_/tutorial003_py310.py hl[79:81] *}

尝试以下操作：

* 使用多个浏览器选项卡打开应用程序。
* 从这些选项卡中发送消息。
* 然后关闭其中一个选项卡。

这将引发 `WebSocketDisconnect` 异常，并且所有其他客户端都会收到类似以下的消息：

```
Client #1596980209979 left the chat
```

/// tip

	biggerBufMax = maxBufferSize

	// If there is a queue, merge up to this many messages.
	maxMergeMessages = 50

	// clientPingInterval will ping the remote handler every 15 seconds.
	// Clients disconnect when we exceed 2 intervals.
	clientPingInterval = 15 * time.Second

	// Deadline for single (non-streaming) requests to complete.
	// Used if no deadline is provided on context.

 * Provides common functionality for handling initialization parameters,
 * content length checks, and default method implementations.
 * It defines the basic structure and configuration options for crawler clients.
 */
public abstract class AbstractCrawlerClient implements CrawlerClient {

    private static final Logger logger = LogManager.getLogger(AbstractCrawlerClient.class);

<img src="/img/tutorial/websockets/image05.png">

## Обработка отключений и работа с несколькими клиентами { #handling-disconnections-and-multiple-clients }

Если веб-сокет соединение закрыто, то `await websocket.receive_text()` вызовет исключение `WebSocketDisconnect`, которое можно поймать и обработать как в этом примере.

# Tarefas em segundo plano { #background-tasks }

Você pode definir tarefas em segundo plano para serem executadas *após* retornar uma resposta.

Isso é útil para operações que precisam acontecer após uma request, mas que o cliente não precisa realmente esperar a operação terminar antes de receber a resposta.

Isso inclui, por exemplo:

* Notificações por e-mail enviadas após realizar uma ação:

 *   <li>missing artifacts</li>
 *   <li>network/transfer errors</li>
 *   <li>file system errors: permissions</li>
 * </ul>
 *
 * TODO carlos: all these possible has*Exceptions and get*Exceptions methods make the clients too
 *       complex requiring a long list of checks, need to create a parent/interface/encapsulation
 *       for the types of exceptions
 */
@Deprecated
public class ArtifactResolutionResult {

        .Builder()
        .addTrustedCertificate(clientCa.certificate)
        .heldCertificate(serverCertificate)
        .build()
    server.useHttps(serverHandshakeCertificates.sslSocketFactory(), false)
    server.enqueue(MockResponse().setBody("abc"))
    server.requestClientAuth()
    val clientCertificate =
      HeldCertificate
        .Builder()
        .signedBy(clientCa)
        .build()

Wenn Sie Daten von einem <abbr title="Client: Eine Software, die sich mit einem Server verbindet.">Client</abbr> (sagen wir, einem Browser) zu Ihrer API senden müssen, senden Sie sie als **Requestbody**.

Ein <abbr title="Anfragekörper">**Request**body</abbr> sind Daten, die vom Client zu Ihrer API gesendet werden. Ein <abbr title="Antwortkörper">**Response**body</abbr> sind Daten, die Ihre API zum Client sendet.